At the age of 13, Sean Swarner's life was irreparably changed when he was diagnosed with Hodgkins lymphoma. He was given 3 months to live. And then, a year later, a totally unrelated cancer, Askins Sarcoma, was diagnosed. This time he was given 14 days to live.   Fast forward a few years, and Sean has become the first cancer survivor to summit Everest. And that was only the beginning.